Comment by znpy
You should look into chinese laptops using the intel n150/n250 cpus. Those have a 6W TDP.
The issue with those cpus is that they're pretty much never used in laptops meant to do anything serious. They usually are employed into cheap plastic laptops using ridiculous batteries.
I would really like the form factor of 2011-2013 thinkpads, with the chonky 90WHr battery on the back and the 12" form factor.
With a modern cpu (low tdp and low power draw) that would be unbeatable everyday carry.